Machine for spinning circular forms of metal



(No Model.) 4 Sheets-Sheet 2. vP. MINK.

MACHINE FOR SPINNING GIRGULAR FORMS OF METAL".

No. 568,984. Patented Oct. 6, 1896.

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4 Sheets-'Sheet 3'. P. M'INK. MACHINE FOR SPINNING CIRCULAR FORMS OF METAL.

Patented Oct. 6, 1896.

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MA HINE FOR SPINNING CIRCULAR FORMS 0P METAL. No. 568,984. Patented Oct. 6, 1896.

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UNITED STATES PATENT OFFICE.

FRITZ MINK, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE KEYSTONE lVATCH CASE COMPANY, OF SAME PLACE.

MACHINE FOR SPINNING CIRCULAR FORMS OF METAL.

SPECIFICATION forming part of Letters Patent No. 568,984, dated October 6, 1896. Application filed April 3, 1893. Serial No.46 8,769. (No model.)

To (LZZ whom it may concern..-

Be it known that I, FRITZ MINK, of the city and county of Philadelphia and State of Pennsylvanituhave invented an lmprovemen t in Machines for Spinning Circular Forms of Metal, of which the following is a specification.

My invention relates to machines for spinning circular forms of metal; andit consists of certain improvements which are fullyset forth in the following specification and are shown in the accompanying drawings.

My invention is particularly intended for spinning or shaping watchcase-centers for the purpose of imparting to them the proper sectional shape, and also, when desired, for embossing or knurling their outer surfaces.

It is the object of my invention to provide an efficient machine for this purpose which shall accomplish the work with rapidity and accuracy.

In carrying out my invention I employ a hollow spinninghead, which contains the center or other article to be spun, and a former, which enters the hollow head and is brought in contact with the metal of the center or object contained within the dies and acts to force the metal into the die-surfaces, and thus imparts the proper shape and ornamentation.

M yin vention includes improvements in the devices for clamping the die and center within the spinning-head and improvements for facilitating their introduction into the head and their removal from it.

It also includes improvements in the manner of imparting the necessary rotation to the spinning-head and former for the purpose of acting upon the metal of the object to be spun.

It is also an object of my invention to render the machine easily adj ustable for different sizes of watchcase-centers and other circular metal forms, so that centers, &c., of the various sizes may be spun upon the same machine.

My invention also relates to certain novel arrangements and combinations of parts, all of which are hereinafter fully described and claimed.

I shall now refer to the accompanyingdrawings for the purpose of particularly describing the construction and mode of operation of my improved machine and of explaining my improvements therein.

Figure 1 is a plan view of my improved machine for spinning watchcase-centers, the. Fig. 2 is a similar view of a portion of the same with some of the parts removed. Fig.

'3 is a longitudinal vertical sectional view of the same on the line a: w of Fig. 1. Fig. 4 is a transverse vertical sectional view on the line y y of Fig. 3. Fig. 5 is a side elevation of the spinning-head. Fig. 6 is an endelevation of the same. Fig. 7 is a longitudinal vertical sectional view of the spinning-head and former on an enlarged scale. Figs. 8 and 9 are perspective views of the die-holding disks or blocks. Fig. 10 is a plan view of the sectional die. Fig. 11 is a transverse vertical sectional view on the line 5 z of Fig. Fig. 12 is a longitudinal sectional view, on an enlarged scale, of the spinning-head; and Fig. 13 is a longitudinal sectional view of a spinning-machine, illustrating modifications of my invention.

A is the stationary frame of the machine. Bis a sliding carriage or frame movable transversely in guides a on the bel A of the frame A.

C is a hollow cylinder or sleeve J urnaled in housings c of the sliding frame The front end of the cylinder constitutes he hollow spinning-head C. The cylinder 01 sleeve 0 may be held against longitudinal ovement by the usual collars c.

D is a plunger located within the hollow cylinder C and movable longitudinally therein. For the purpose of moving the plunger D longitudinally in the cylinder C, I prefer to connect its rear end with the rear end of the cylinder by a knuckle-joint operated by a segment and pinion. This construction is particularly shown in Figs. 1 and 3 and is as follows: C is a box carried on the rear end of the cylinder C. D is an externally-threaded bushing screwed into the end of the cylinder C. D is a bolt extending through the bushing-D and connecting with the rear end of the plunger D by a knuckle joint D D is a toothed segment carried by the knucklejoint and adapted, when rocked, to operate,

the joint and impart an endwise movement cess therein.

to the plunger. The segment D' extends laterally in a slot (Z in the box C and is engaged by a pinion E on a lever E, fulcrumed in a stud or pin 6 on a bracket E The lever E and its pinion E may be removed from the fulcrum-pin when the plunger has been adjusted, so that it will not interfere with the rotation of the box G and cylinder 0. This construction forthe purpose of operating the plunger D, while preferred, is not in any way essential, and an y other suitable construction may be employed for this purpose.

In the modification shown in Fig. 13 a clifferent construction is illustrated, of which a full explanation is made hereinafter.

I prefer the knuckle-joint and segment and pinion construction by reason of the factthat great force may be applied through it in moving the plunger.

The head of the cylinder 0, which forms the hollow spinning-head C, is preferably enlarged internally and is provided with an annular contracted openingfin its face to admit the former or spinning-tool. This annular contracted opening f in the face of the head C forms an annular shoulder or offset f on the interior of face about the opening. 011 one side of the head 0 is an elongated opening or slot F, communicating with the interiorof the head. This elongated opening or slot F is intended to admit the die-blocks, die, and center into the hollow head, and is preferably inclined, as is shown in dotted lines in Fig. 6. 0n the otherside of the head 0, opposite the elongated opening or slot F, is a finger-hole F.

G G are movable pieceslocated within recesses g in the head 0 and movable longitudinally therein. These movable pieces G are provided with headsor extensions G, which project through slots or openings 9 in the inner surface of the head into the hollow re The pieces G are so located that their heads G are immediately adjacent to the annular shoulder or ledge f. H are springs bearing upon the pieces G and acting to normally move them to the rear, so that the headsG will assume a position to the rear of the shoulder f and project into the recess in the head through the slots 9, as is shown in Fig. 12. In the drawings I have shown the preferable construction of these movable piecesG. They consist of tubular pieceshaving closed inner ends and heads G and fit in longitudinal bores g, in which they are free to move to a slight extent. The springs H are contained in the tubular piece G and are retained by screw-plu gs H, screwed intothe open ends of the bores g. The springs are thus held by the plugs H and act upon the rear closed ends of the tubular pieces G, so as to normally hold them in the extreme rearward positionshown in Fig. 12. By adjusting the screw-plugs H the tension of the spring H may be regulated.

I J are two die-blocks suitably recessed to contain the sectional die K, which is clamped between them. The die-block J is provided with a central opening or aperture j to admit the forming-tool.

The watchcase-center or part to be spun or shaped is placed within the sectional die K, which is then placed between the die-blocks I and J. These blocks I and J, with the die and center clamped between them, are then inserted through the slot F in the side of the head 0 in front of the head D of the plunger D, which has been previously retracted. The blocks I and J, with the die and center, are then within the head 0 behind the heads or extensions G of the pieces G and in front of the head D of the plunger. IVhen the plunger D is moved forward, the heads G of the movable pieces G are pushed forward beyond the annular shoulder), and the blocks I and J-, with the die and center, are firmly clamped between the head D and the shoulder f, as is shown in Fig. 7. The blocks I J are thus movedforward in the head 0 beyond the slot F, through which they are inserted. When the plunger D is moved back, the blocks I J are acted upon by the heads of the blocks G and are pushed back by them until they are again brought in line with the slot F. The blocks I J are preferably circular, as shown, so that they may pass easily through the slot F into the interior of the hollow head 0.

The sectional die K is shaped in the proper,

manner in cross-section to impart the required shape to the center, and may also be provided with an internal knurled or ornamental die -sunk surface to impart the knurled, ornamented, or embossed surface to the center.

L is the former or shaping-tool shaped in the well-known manner to correspond with the shape to be imparted to the center. I prefer to construct the shaping-head of the former of one piece with the shank or stem, as a stronger and more efficient tool is in this way obtained. The former Lis carried rigidly in a spindle L, journaled in suitable housingsl and Z. The former L is preferably seated in a tapered seat in the head of the spindle and is carried bya rod L extending.

longitudinally through the spindle L. The stem of the former L is screwed into a threaded seat in the end of the rod L and by turning the rod L the former L is drawn into the tapered seat in the head of the spindle L. The rod L is provided with a head Z bearing against the rear end of the spindle L to hold the rod against forward movement. By em.-

ploying a former L, detachably connected with the rod L it may be readily detached when desired for the purpose of su bstituting another former.

The housing 1 is carried by a sliding carriage M, guided in suitable longitudinal guides 'm on a frame M upon the main frame A, and is operated by a lever N, fulcrumed as at n to the stationary frame M and connected at 'n with the sliding carriage M.

The front end of the spindle L is held against longitudinal movement in the housing Z by suitable flanges or collars Z so that it will be moved longitudinally by the housing when the slide M is moved. The rear end of the spindle L is movable longitudinally in a sleeve L journaled in the housing Z, and is keyed to the sleeve by a spline or feather n.

O is a gear-wheel carried by the sleeve L and engaging a pinion upon ashaft 0, journaled in bearings o in a bracket 0 carried by the frame A. O is a driving band-wheel on the shaft 0. The spindle L and former L are driven from the band-wheel 0 through the shaft 0, pinion O, gear-wheel O, and sleeve L.

P is a lever fulcrumed as at p to a frame P and having its end connected bya link with the transversely-movable slide or carriage B, which carries the cylinder 0. The carriage B and the cylinder C carried by it are moved transversely in the guides a by the lever P.

Q is a stop carried by the frame P and adapted to strike the frame B to limit its outward movement under the action of the lever P. The stop Q may be adjusted. (See Fig. 2.) The frame P may be adjusted in a bracket A of the frame A by means of a bolt q, passing through a slot q in the bracket. (See Fig. 11.) A stop (1 carried by the bracket A and bearing against the frame P, may be employed to regulate the adjustment of the frame P. By the adjustment of the frame P the fulcrum-point p of the lever P may be moved to or from the frame or carriage B.

Q is an adjustable stop-bar carried by the.

slide B, and provided with a catch or projection in the line of movement of the lever P to limit its action. R is a wheel carried by the cylinder 0, by means of which it may be turned by hand when required.

S is a pin or stop carried by a lever S, fulcrumed to the frame B, as at s. This pin or stop engages a recess in the cylinder 0, as in the collar 0, to indicate the point at which the cylinder should be stopped. The object of these devices is to bring the cylinder 0 in such a position that the slot or opening F will be presented on the side to facilitate the introduction or removal of the blocks I J and die from the head 0. By means of the wheel R the cylinder may be turned until the pin or stop S enters the recess in the cylinder, and thus indicates that the head 0 is in the proper position. The stop or pin S may be caused to enter the recess in the shaft by the weight of the lever S or by a spring acting in the lever.

T is aguide-rod carried by the sliding frame or carriage M, and guided in a recess or bore tin the frame M. This rod T may be provided with a slot or groove i, provided with notches 6 t adapted to receive a spring-bolt T, working in the frame M.

By this means the carriage M may be locked in either of its extreme positions. The rod T may be made adjustable in the frame or carriage M.

I shall now particularly explain the mode of operation of the apparatus described.

Before the plates or blocks I J are introduced into the hollow spinning-head C the slide M is moved back by the lever N, so as to retract the spindle L and withdraw the former L from the head 0. By means of the pinion E acting on the segment D the plunger D is retracted. The movable pieces G, under the action of the springs H, are moved rearwardly, so that the heads G project into the hollow head 0 beyond the shoulderf, as is shown in Fig. 12. The sectional die K is then placed upon the center or circular metal piece to be spun and the die and inclosed center are placed between the plates or blocks I J. These parts are then inserted in the head 0 through the slot F and assume a position therein between the head D of the plunger D and the heads G of the pieces G. The plunger D is now moved forward by the pinion E, and the plates I J, with the inclosed die and center, are pushed forward until they are firmly clamped between the plunger-head D and the shoulder f, as,

shown in Figs. 3 and 7. By this forward movement of the plates I J the pieces G are pushed forward so as to lie beyondthe shoulder f. The pinion E is now removed and the slide or carriage M is moved forward by the lever N until the former L enters the open end f of the head 0' and passes through the aperture j on the front plate J, so as to assume a position directly in line with the interior of the center. The carriage or slide B is then moved laterally by the lever P until the inner surface of the metal center is in tight contact with the former L. The former L is rotated by the shaft in the manner heretofore described, and by friction drives the spinning-cylinder C in its bearings c c, and at the same time it acts upon the metal of the center and pressesit into the faces of the die K, causing it to assume the proper shape and to receive the ornamentation or knurling from the die.

When the center has been properly spun,the frame or carriage B is moved back so as to center the form er L in the head and move it from contact with the center. The carriage or slide M is then moved back so as to withdraw the former from thehead O. The pinion E is then placed on its stud e an d is brought into engagement with the segment D*. This may be accomplished by turning the cylinder C by the hand-wheel R until the'sto p S enters the recess 8. This turning of the cylinder 0 also brings the slot or opening F in the proper positions on the side of the head 0. The plunger D is then retracted and the heads G of the pieces G are pushed back by the springs H, thus moving back the plates I J until they come in line with the opening or slot F, when by inserting the finger through the opening F they may be pushed out through the slot F. The finished center is then removed and a new piece is inserted between the die-piece K, and the operation is repeated as before.

It will be observed that the devices for moving the slidingframes or carriages B and M and the stops for controlling the extent of their movements are all adjustable, so that they may be regulated to suit different sizes of centers or circular forms to be spun. The machine is thus readily adjustable to suit the work to be done.

While I prefer the details of construction shown, I do not mean to limit myself to them, as it is apparent that they may be varied in many ways without departing from the in.- vention, and in Fig. 13 I have shown amodification of the machine. In this modified construction the spinni n g-cylinder C is driven directly and not by friction from the former,

Referring now particularly to the modifiedconstruction shown in Fig. 13, I is the hollow spinning-cylinder, having the spinninghead I and being of substantially the same construction as the spinning-cylinder 0, heretofore described. The spinning-cylinder I is journaled in suitable bearings 2' in a stationary frame I and carries a'driving-wheel 1 J is the plunger within the cylinder I, acting upon the blocks which contain the die and metal center, to be formed substantially as in the construction previously described. The plunger J is connected at its rear end by a coupling J with a screw J which is carried in a bushing J in the rear of the cylinder 1, and the screw J is provided with a hand-wheel J by which it may be turned to impart the necessary longitudinal movements to the plunger. The cylinder 1 may be arrested in proper position by a movable pin or bolt 1 carried by the stationary frame and entering a recess 1 in the cylinder I. The former K is carried by a longitudinally-movable shaft K in transversely-movable carriage or frame K W'ith this construction the former is moved forward until it enters the opening of the spinning-head I and is brought into proper position with reference to the die and center, and the carriage K is moved laterally until the former is brought in contact with the metal. The spinning operation is accomplished by the positive rotation of the cylinder I, which rotates the center in contact with the former.

That 1 claim as new, and desire to secure by Letters Patent, is

1. In a machine forspinnin g circular forms of metal, the combination of a spinning-head adapted to receive and hold the work, and a positively-driven spinning-tool adapted to act upon the inner surface of the work and by its positive rotation impart a rotary movement to the work, whereby the different portions of the work are successively acted upon by the positively-driven spinning-tool.

2. In a machine for spinning circular forms of metal, the combination of a rotatable and transversely-movable hollow spinning-head, means to clamp the object to be spun and the die within the head, and a former movable longitudinally with reference to the spinninghead.

3. In a machine for spinning circular forms of metal, the combination of a rotatable hollow spinning-head, a rotatable former, said spinning-head and former having freedom of longitudinal and transverse movement with reference to one another, and means to clamp the object to be spun and the die within the spinning-head.

4. In a machine for spinning circular forms of metal, the combination of a rotatable hollow spinning-head having an opening in its face, a plunger movable longitudinally in the spinning-head, a rotatable former movable longitudinally with reference to the spinning-head and means to positively rotate the former.

5. In a machine for spinning circular forms of metal, the combination of a rotatable cylinder having a hollow spinning-head provided with an opening in its face, a longitudinally-movable plunger located in said cyl-. inder and extending intothe hollow spinninghead, means to move the plunger longitudinally from the rear of the cylinder, a rotatable former and means to positively rotate the former, the former and spinning-head being movable longitudinally with reference to one another. a

6. In a machine for spinning circular forms of metal, the combination of a rotatable cyl: inder having a hollow spinninghead provided with an opening in its face, a longitudinally-movable plunger located in the cylin: der and extending into the hollow spinninghead connected at its end bya knuckle-joint with the rear end of the cylinder, means to operate the knuckle-joint, a rotatable former movable longitudinally with reference to the spinning-head, and means to positively rotate the former.

7. In a machine for spinning circular forms of metal the combination of a rotatable cylinder having a hollow spinning-head provided with an opening in its face, a longitudinally-movable plunger located in the cylin: der and extending into the hollow spinninghead connected at its end by a knuckle-joint with the rear end of the cylinder a toothed.

segment carried by the knuckle-joint, a pinion gearing with the segment to operate the knuckle-joint, and a rotatable former movable longitudinally with reference to the spinning-head.

8. In a machine for spinning circular forms of metal, the combination of a transverselymovable rotatable hollow spinning-head having an opening in its face, means to clamp the object to be spun and the dies Within the head, a longitudinally-movable former in line with the hollow spinning-head, and power devices to positively drive the former.

9. In a machine for spinning circular forms of metal, the combination of a transverselymovable rotatable hollow spinning-head having an opening in its face, adjustable stops to limit the transverse movement of the spinning-head, means to clamp the object to be spun and the dies within the head, a longitudinally-movable former in line with the hollow spinning-head, and power devices to positively drive the former.

10. In a machine forspinnin g circular forms of metal, the combination of a stationary frame, a transversely-movable frame guided thereon, a rotatable hollow spinning-head carried by the transversely-movable frame, means to clamp the object to be spun and the die in the hollow spinning-head, and a longitudinally-movable rotatable former in line with the spinning-head.

11. In a machine forspinning circular forms of metal the combination of a stationary frame, a transversely-movable frame guided thereon, a rotatable hollow spinning-head carried by the transversely-movable frame, means to clamp the object to be spun and the die in the hollow spinning-head, a longitudinally-movable frame in line with the spinning-head, a rotatable former carried by the longitudinally-movable frame, and power devices to positively drive the former.

12. In a machine for spinning circular forms of metal, the combination of a rotary hollow spinning-head having an opening in its face, a rotatable spindle in line with the hollow spinning-head, a former carried by the rotatable spindle and a clamping-rod connected with the former and extending longitudinally in the shaft.

13. In a machine for spinning circular forms of metal, the combination of a hollow rotary spinning-head having an opening in its face, a longitudinally-movable frame in line therewith, a rotary spindle carried by the frame and a former carried by the spindle.

14:. In a machine for spinning circularforms of metal, the combination of a hollow rotary spinning-head having an opening in its face, a longitudin ally-movable frame in line therewith, alever to move the frame longitudinally, a rotary spindle carried by the frame, and a former carried by the mandrel-shaft.

15. In amachine forspinning circularforms of metal, the combination of a hollow rotary spinning-head having an opening in its face, a longitudinally-movable frame in line therewith, stops to limit the movement of the frame, a rotary spindle carried by the frame, and a former carried by the mandrel-shaft.

16. In amachine for spinning circular forms of metal, the combination of a rotary hollow spinning-head having an aperture in its face,

a stationary guide-frame M, a longitudinallymovable frame M guided thereon, a guide-rod T carried by the movable frame M and guided in the stationary frame M, a springstop acting uponthe rod T to limit the movement of the frame M, and a rotary former carried by the frame M.

17. In a machine for spinning circular forms of metal, the combination with a rotary former, of a rotary hollow spinning-head having an openingin its face to admit the former, and an opening in its side to admit the die and object to be operated upon.

18. In a machine fol-spinning circular forms of metal, the combination with a rotary former, of a rotary hollow spinning-head having an opening in its face to admit the former and an opening in its side to admit the die and object to be operated upon, and a fingerhole in the side opposite the opening to admit the die and object.

19. In a machine for spinning circular forms of metal, the combination with a rotary former, of a hollow rotary spin hing-head having an opening in its face to admit the former, and an annular shoulder upon the interior of the face about said opening, and a longitud inally-movable clamping-plunger within the head in the rear of the annular shoulder about the opening in the face.

20. In a machine for spinning circular forms of metal, the combination with a rotary former, of a hollow rotary spinning-head havin g an opening in its face to admit the former, and an annular shoulder upon the interior of the face about said opening, and provided with an aperture to admit the die and object to be spun located in the rear of the annular shoulder about the opening in the face, and a longitudinally movable clam ping plunger within the head in the rear of the annular shoulder about the opening in the face.

21. In amachine for spinning circular forms of metal, the combination with a rotary former, of a hollow rotary spinning-head having an opening in its face to admitthe former and an opening in its side to admit the object to be spun and the die, a longitudinallymovable plunger in the spinning-head, and spring-pressed movable pieces carried by the head adjacent to the opening in the face and projecting into the interior of the head in front of the plunger.

22. Inamachine for spinning circular forms of metal, the combination with a rotary former of the rotary cylinder 0 having the hollow spinning-head O with the central opening fin the face and the side opening F, and having the projecting ledge f about the opening f, the plunger D movable in the cylinder 0, and the sectional die K and dieclamping plates I, J.

IIO

2-3. In a machine for spinning circular forms of metal, the combination with a rotary former, of the rotary cylinder 0 having the hollow spinning-head O with the central opening f in the face and the side opening F, and having the projecting ledge f about the opening f, the plunger D movable in the cylinder 0, the spring-pressed pieces G having heads G normally projecting into the htllow head adjacent to the rear of the ledge f, and the sectional die K and clampingplates I, J.

24. In a machine for spinning circular forms of metal, the combination with a rotary former, of the rotary cylinder 0 having the hollowspinninghead O with the central faceopeningf and the side opening F, and having the projecting ledge f about the face-openingf', the spring-pressed pieces G carried by the spinning-head 0 and having the heads G normally projecting into the hollow head adjacent to and in the rear of the ledge f and the movable plunger D in the cylinderC.

25. In a machine for spinning circular forms of metal, the combination with the hollow spinning-head having a side opening F,-of the sectional die K and the clamping-blocks I, J to contain the die and center the head through the opening F.

26. In a machine for spinning circular forms of metal, the hollow spinning-head 0 having the side opening F the face-opening f with the surrounding ledge f, and the recesses g the pieces G located in the recesses g and having heads G projecting into the interior of the cylinder adjacent to the ledge f, and springs I-I bearing on the pieces G and normally forcing them rearwardly. v

27. In a machine for spinning circular forms of metal, the hollow spinning-head Ohaving the side opening F the face-opening f with the surroundingledge f and the recesses g, the pieces G located in the recesses g and having heads G projecting into the interior of the cylinder adjacent to the lcdgef, the springs H bearing on the tubes G and normally forcing them rear\vardly,and the screwplugs H for holding the springs H.

28. In a machine for spinning circular forms of metal, the combination with the dies to contain the object to be spun of a positivelydriven rotary spindle, a former carried by the spindle, and a clamping-rod extending through the spindle and engaging the shank of the former to clamp it in the spindle and permit it to be positively driven thereby.

29. In a machineforspinning circular forms of metal, the combination with a recessed spinning-heacLand the dies to contain the object to be spun, of a positively-driven rotary spindle L, a former L carried thereby, and the clamping-rod L having the head I extending through the spindle and engaging the shank of the former so as to clamp the former in the spindle and cause it to be driven thereby.

In testimony of which invention I have hereunto set my hand.

FRITZ MINK. lVitn esses:

ERNEST HOWARD HUNTER, HELEN L. MOTHERWELL. 

